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| Main Authors: | , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
1992
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.732390 |
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| _version_ | 1867170456643043328 |
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| author | Svendsen, John Inge Mangerud, Jan Elverhoi, Anders Solheim, Anders Schüttenhelm, Ruud TE |
| author_facet | Svendsen, John Inge Mangerud, Jan Elverhoi, Anders Solheim, Anders Schüttenhelm, Ruud TE |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Late Weichselian glacial history of the continental shelf off western Spitsbergen is discussed, based on acoustic sub-bottom records and sediment cores. The outer part of Isfjorden and the inner shelf to the west of this fjord are characterized by a thin veneer (10-20 m) of glacigenic sediments and absence of ice-marginal features. Towards the outer shelf the sediment thickness increases significantly, and exceeds 500 m at the shelf edge. Possible moraine complexes were identified in this outer part. Sediment cores from the inner shelf sampled a firm diamicton, interpreted as till, beneath soft glaciomarine sediments. Radiocarbon dates on shells from the clay resting directly on the till, suggest an age of around 12,500 yrs B.P. for the base of the marine sequence. We argue that grounded ice covered the sites shortly before. In contrast to suggestions that the fjords and coast were partly ice free during the Late Weischselian, we conclude that the ice must have reached out onto the continental shelf. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_732390 |
| institution | PANGAEA |
| language | en |
| publishDate | 1992 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Age determination of sediment cores off western Spitsbergen Svendsen, John Inge Mangerud, Jan Elverhoi, Anders Solheim, Anders Schüttenhelm, Ruud TE 87-137PC; 87-138; 87-144PC; 88-PCM-01; 88-PCM-2; 88-PCM-3; PC; Piston corer; Quaternary Environment of the Eurasian North; QUEEN; QUEEN_Exped The Late Weichselian glacial history of the continental shelf off western Spitsbergen is discussed, based on acoustic sub-bottom records and sediment cores. The outer part of Isfjorden and the inner shelf to the west of this fjord are characterized by a thin veneer (10-20 m) of glacigenic sediments and absence of ice-marginal features. Towards the outer shelf the sediment thickness increases significantly, and exceeds 500 m at the shelf edge. Possible moraine complexes were identified in this outer part. Sediment cores from the inner shelf sampled a firm diamicton, interpreted as till, beneath soft glaciomarine sediments. Radiocarbon dates on shells from the clay resting directly on the till, suggest an age of around 12,500 yrs B.P. for the base of the marine sequence. We argue that grounded ice covered the sites shortly before. In contrast to suggestions that the fjords and coast were partly ice free during the Late Weischselian, we conclude that the ice must have reached out onto the continental shelf. |
| title | Age determination of sediment cores off western Spitsbergen |
| topic | 87-137PC; 87-138; 87-144PC; 88-PCM-01; 88-PCM-2; 88-PCM-3; PC; Piston corer; Quaternary Environment of the Eurasian North; QUEEN; QUEEN_Exped |
| url | https://doi.org/10.1594/PANGAEA.732390 |